Calculate your daily
total Watt-hour requirement. Estimate how many
hours you would use each appliance for over solar
water heater price in Chennai a
typical week, then divide by 7 for a daily rate. Multiply each appliance’s
wattage solar
water heaters in Chennai by the
hours you’ll use it for in a day. Then add all the totals together to get the
final daily total Watt-hours you require.

Next calculate your panel
size. Simply divide the daily total Watt-hours you
require by the hours of usable light solar
water heaters in Chennai you expect
in an average day. This will give you your solar
water heater price in Chennai minimum
panel wattage. In the UK, allow 1 hour of light in winter, rising to 4 hours by
mid-summer.